The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2025
Filed:
Jun. 21, 2022
Zhejiang Nhu Co., Ltd., Zhejiang, CN;
Zhejiang Nhu Special Materials Co., Ltd., Zhejiang, CN;
Zhejiang Nhu Nylon Materials Co., Ltd., Zhejiang, CN;
Zhirong Chen, Zhejiang, CN;
Wenbin Wu, Zhejiang, CN;
Hong Yin, Zhejiang, CN;
Zengshi Zha, Zhejiang, CN;
Keyan Wang, Zhejiang, CN;
Li Ma, Zhejiang, CN;
Guodong Huang, Zhejiang, CN;
Guiyang Zhou, Zhejiang, CN;
Yong Xu, Zhejiang, CN;
ZHEJIANG NHU CO., LTD., Zhejiang, CN;
ZHEJIANG NHU SPECIAL MATERIALS CO., LTD., Zhejiang, CN;
ZHEJIANG NHU NYLON MATERIALS CO., LTD., Zhejiang, CN;
Abstract
A multidentate phosphite ligand is used in the catalytic synthesis of adiponitrile. The ligand is represented by the following general formula (I). The method of catalytic synthesis of adiponitrile comprises primary hydrocyanation, isomerization, and secondary hydrocyanation reactions, wherein the catalyst adopted each comprises a phosphite ligand-nickel complex composed of a nickel precursor and a multidentate phosphite ligand. The ligand molecule has a higher electron cloud density, and the phosphorus content capable of participating in coordination in the ligand molecule per unit mass is higher, so that the catalytic activity of the catalyst is improved, and the amount of the catalyst is reduced.